Tests of Fabricated Multilayered Ring-Stiffened Cylindrical Models under External Hydrostatic Pressure

摘要

An exploratory investigation was carried out to study the strength of ring-stiffened multilayered cylindrical shells under external hydrostatic pressure. Four HY-100 steel models, having relatively large shell thickness-to-diameter ratios, were tested to collapse. The weight-to-displacement ratios for all models were approximately equal. The tests indicated that for the weight-to-displacement ratio studied, the strength of a single-layered ring-stiffened cylindrical model could be attained by a model with a shell consisting of two layers, each layer one-half the single-layered shell thickness, with a moderate increase in shell yield strength. It was also indicated that the strength of the single-layered model could not be attained in a model with a shell consisting of layers of one-fourth the single-layered shell thickness without a very large increase in the yield strength of both shell and frame material. (Author)